強制振動実験における解析法へのアプローチ : (その2)常時微動影響を考慮した一質点系回帰分析の誤差評価

抄録

For the examination of dynamical characteristics of structures and their elements, we use a method of forced vibration generators to find natural frequencies and damping ratios. A large amount of data which includes experimental errors, so to say sensitive error and physical error, should be gathered from vibration tests. Described in detail in the author's previous paper, "An Approach to the Analysis of Forced Vibration tests (Part 1) Regression Analysis of Resonance Curves by the Theory of One-Degree Systems", was how to exclude the sensitive error using a statistical method. Physical error can be deviled into two kinds of errors. One is lineage error which is caused by the dynamical characteristics of measuring devices and it was also described in the previous paper how to automatically correct amplitudes that include lineage error. The other is chance error which is inevitably induced in all of the measurements. This chance error, which is larger than the lineage error, might be introduced into the actual vibration tests influenced by microtremors for smaller force of a vibrational generator.